Infowars reports: The letter was addressed to Trump Jr., the eldest child of the president and his ex-wife Ivana.

“There is no indication anyone suffered any injuries and no sign that the substance was a hazardous material or a biological agent,” reports NBC News.

“How disturbed must a person be to do what they did to a mother of five children?” Michael Cohen, President Trump’s personal attorney, said in a statement. “This dangerous and reckless act goes beyond political differences.”

In addition to the powdery substance, the envelope contained a letter saying something to the effect of how the stunt was payback for past misdeeds by Trump Jr., according to The New York Post.

The NYPD’s elite Emergency Services Unit, a hazmat team, the department’s Intelligence Bureau, the Secret Service, the Department of Environmental Protection and the FBI’s Joint Terrorism Task Force all responded to the scene.